Agree they have a bonding issue, or another GND problem downstream. Choochooman, I don't want to provide that bonding for the whole campground (and maybe one of the other campers that does have a fault condition...) so I'm definitely not going to create my own GND bond.
Ps - the office did say they would get an electrician out first thing in the morning, but I'll be gone by then. Just taking my chances tonight but limiting use of items with a ground plug just in case they have an unknown fault and thereby create that 'bond' I don't want to be...